Heating, Air Conditioning, Fridge, HVAC/BLOWER MOTOR RPM
I HAVE A 1962 INTERNATIONAL FORCED AIR FURNACE (FLOOR REGISTERS),IN A MOBILE HOME, WITH A LATER ADDED SEARS A/C CONDENSING UNIT. THE PREVIOUS OWNER REPLACED THE BLOWER MOTOR WITH A 3 SPEED MOTOR, WIRED TO THE HIGHEST RPM, WHICH DOESN'T SEEM RIGHT. IS THERE A STANDARD RPM THAT THE BLOWER CAGE SHOULD RUN AT? I CAN'T FIND A RPM LISTED ON ANY PLACARD.
If you look on the motors rating plate itself it should tell what RPM the motor is running at.
The CFM is what you should be concerned about?
The motor drives the blower wheel which produces the CFM.
If the motor is different then the original motor the furnace came with the speck sheet that should be pasted on the inside of the blower compartment may not help?
The furnace blower needs to produce 400 CFM per ton of cooling.
There should also be a blower relay on the furnace that changes the RPM & CFM for heating or cooling depending on what the thermostat is set at?